Knife for cutting pile fabric



Oct. 26 1926. 1,604,286

' E R HOLMES KNIFE FOR CUTTING FILE FABRIC Filed March 26, 1924 Patented Oct. 26, 1926.

UNITED STATES 1,604,286 PATENT orrics.

ELBBIDGE R. HOLMES, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOIII WOEKSv OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

KNIFE FOR CUTTING PILE FABRIC.

Application filed March 26, 1924.

This invention relates to means for cutting the pile loops in a carpet loom of the type in which the pile warps are crossed to form loops over pile wires which extend longitudinally of the fabric. In such looms, it is customary to form the knives integrally with the front ends of the pile wires or to mount detachable blades on the pile wires which then act as holders for the blades.

My invention relates particularly to the latter type of construction and has for its object the improvement of such knives and holders, to the end that more effective and satisfactory operation may be obtained.

An important feature of my invention relates to the provision of a holder or sheath for the knife blade, by which the operator is protected from injury.

Another feature of my invention relates to the provision of a special form of holder in which the cutting blade will be ac urately supported in vertical position and will be centered accurately above its pile wire.

Further features of my invention relate to the specific construction of the cutting blade and to certain arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings in which Fig. 1 is a sectional side elevation of parts of a pile fabric loom, showing my invention embodied therein;

Fig. 2 is an enlarged side elevation of a longitudinal pile wire and cutting blade;

Figs. 3 and 1 are detail sectional eleva tions, taken along the line 3-3 and 44 in Fig. 2, and

Fig. 5 is a side elevation of one of the cutting blades.

Referring to the drawings, I have shown a portion of a loom frame comprising a breast beam 10, a fabric supporting member 11, a take-up roll 12, a reed 13 in a lay 1 1, and a longitudinal pile wire 15. I have also indicated a guide 16 for the rear end of the wire by which the pipe warp W may be displaced alternately upon opposite sides of the pipe wire 15.

The parts thus far described are in general of the usual type and in themselves form no part ofimy present invention. which Serial No. 702,152.

relates particularly to the cutting blade 20 (Fig. 5) and to the sheath or holder 21 by which it is detachably positioned upon the pile wire 15.

The blade 20 is preferably formed of thin sheet steel of uniform thickness and is of substantially less thickness than the pile.

wire 15, as indicated in Fig. 3. At its rear end, the blade 20 is provided with an upwardly and forwardly inclined cutting edge 22, adapted to sever the pile loops as the fabric F is drawn forward by the take-up roll 12.

The holder or sheath 21 is also formed of relatively thin sheet material, bent to a U- shaped section and having its lower edges firmly secured to the wire in any convenient manner, as by small rivets 23. The sides of the holder are preferably offset inwardly adjacent the upper edge of the wire 15. so that the sides of the holder will closely engage the blade at all points and will thus firmly and accurately center the blade on the wire 15.

A cross pin 24 (Fig. 2) forms a stop for the blade as it is inserted from the open rear end of the holder, and the holder is also provided with a recess 25 which permits the loops of the warp IN to engage the cutting edge 22 of the blade 20 and to be accurately severed thereby. The overhanging portion 26 of the holder 21 serves as a guard to prevent accidental injury of the operator by contact with the sharp edge 22 of the blade 20.

The great advantage of my construction lies in the fact that the blades 20 may be very cheaply and easily manufactured and that they may be removed from the pile wire when dull and may be replaced by fresh blades without dismantling the warp or displacing any portion of the loom.

It has been heretofore necessary to stop the loom frequently and for considerable periods of time while the cutting blades were being sharpened but this delay is very largely reduced by the use of my improved detachable blades.

Having thus described my invention and the advantages thereof I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is:--

1. Means for cutting pile fabric comprising a longitudinal pile wire, a relatively thin cutting blade detachably mounted thereon, and a holder for said blade, said holder securingsaid blade in a definite fixed position on said pile wire and aportion of said holder being extended rearward beyond said blade to form a guard for portions of the cutting edge of the blade.

2. lilo-ans for cutting pile fabric comprising a longitudinal pile wire, a relatively thin cutting blade detachably mounted. thereon, and a thin sheet metal holder for said blade, said holder securing said blade in a definite fixed position on said pile wire and said holder being formed with an in verted U-shape and being secured in fixed -)osition on said )ile wire alon the lower edges of said holder.

3. Means for cutting: pile tabric comprising a longitudinal pile wire, a relatively thin cutting blade detachably mounted thereon, and a thin sheet metal holder for said blade, said holder entirely enclosing said blade except at a point where said holder is recessed at its rear end to afford entrance tor the fabric to a portion of the cutting edge oi the blade.

4-. Means for cutting pile fabric comprising a longitudinal pile wire, a cutting blade detachably mounted thereon, and a. holder for said blade fixed on said wire, said blade being formed of thin sheet steel of uniform thickness throughout and of less thickness than said wire, and said holder being of thin sheet metal having an inverted U-shape and being fixed to said wire along its lower edges. and the sides of said holder being inwardly offset adjacent the upper edge of said wire to closely engage and center said blade.

In testimony whereof I have hereunto atfixed my signature.

ELBRIDGE R. HOLMES. 

